Smart City Multi-Utility Inspection Rover: A Wi-Fi Controlled Mobile Platform with Live Video, Environmental Sensing and GPS Reporting

Author

Mr Nagadhananjay Kangalavar, Mr Abhishek Teradale, Mr Nagaraj Singadi, Mr Nandan Patil, Prof. Vishwanathswamy B

Abstract

 Checking roads, public areas and utility sites usually means sending a person to each spot with a separate instrument for every quantity of interest. This paper describes a small remotely driven rover built to make that routine easier under human supervision. The rover is steered from an Android application over Wi-Fi. An ATmega microcontroller handles motor switching and sensor reading, an ESP8266 module carries commands and data between the phone and the controller, and an independent ESP32-CAM board serves live video so that the video load never competes with motor control. On board are a DHT11 temperature and humidity sensor, an MQ-2 gas and smoke sensor, an ultrasonic range finder and a NEO-6M GPS receiver, with a 16×2 LCD for local status. Power comes from a 12 V lead-acid battery through an LM2596 step-down module. The robot is deliberately manual: it does not drive itself, and its MQ-2 output is a relative response, not a calibrated concentration. Since measured values were not recorded in this phase, the analysis is built on component ratings and standard models: an echo-time model for the range finder, a voltage-divider check for the 3.3 V interfaces, a stall-current margin for the L293D driver, and a runtime budget. A test plan for the missing measurements is given.

Keywords

Smart city, mobile robot, remote inspection, ATmega, ESP8266, ESP32-CAM, environmental monitoring, GPS, Wi-Fi control, embedded systems.

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References

[1] Microchip Technology Inc., “ATmega series datasheet,” for the exact device fitted in the prototype.

[2] Espressif Systems, “ESP8266EX datasheet.”

[3] Espressif Systems, “ESP32 series datasheet” and ESP32-CAM board documentation for the revision used.

[4] Texas Instruments, “L293x quadruple half-H drivers,” datasheet.

[5] u-blox, “NEO-6 series GPS modules data sheet.”

[6] Texas Instruments, “LM2596 SIMPLE SWITCHER power converter,” datasheet.

[7] Manufacturer datasheets for the DHT11 temperature and humidity sensor and the MQ-2 gas sensor module.

[8] Datasheet of the ultrasonic distance module fitted in the prototype.

[9] Hitachi, “HD44780U dot matrix liquid crystal display controller/driver,” datasheet.

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